Calling QSH with variables from CL

Hello,

I'm trying to dynamically assemble a string to be forwarded to QSH for execution, but I'm most likely falling over the multiple apostrophes.

Actual CL program:

PGM
DCL VAR(&MYSTR) TYPE(*CHAR) LEN(5) VALUE('Hello')
DCL VAR(&QSHDOIT) TYPE(*CHAR) LEN(80)
CHGVAR VAR(&QSHDOIT) VALUE('echo'' *BCAT &MYSTR *CAT ''; echo $?')
QSH CMD(&QSHDOIT)
ENDPGM

Expected content of &QSHDOIT:
echo Hello; echo $?

Expected console output of qsh:
Hello
0

Instead, I get an error message stating, that there's no such command echo *BCAT &MYSTR *CAT.

What am I doing wrong here? I remember there was a discussion about a similar topic not too long ago, but I can't find it.

I hope, my mail client doesn't mess with the formatting.

Thanks!

:wq! PoC

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